Mode of feeding kosin to the fires of glass-furnaces



BENJAMIN SHIVERICK,

0F NORTH SANDWICH MASSACHUSETTS.

MODE OF FEEDING ROSIN TO THE FIRES OF GLASS-FURNACES,

Speccaton of Letters Patent No. 9,569, dated February 1, 1853.

To aZZ whom t may concern Be it known that I, BENJAMIN Srirvnnrcir, of North Sandwich, in the county of Barnstable and State of Massachusetts, have invented new and useful Improvements in Furnaces that are termed Glory-Holes and Used in the Manufacture of Glassware; and I do hereby declare that the same are fully described and represented in the following specification and the accompanying drawings, letters, figures, and references thereof.

0f the said drawings Figure 1 denotes a front elevation of my improved furnace or glory-hole. Fig. 2 is a side elevation of it. Fig. 3 is a central, vertical and longitudinal section of it. Fig. 4t is a horizontal section taken through the embrasures. Fig. `5 is a horizontal section taken through the heat dampers of the pot, for melting the rosin. Fig. 6 is a transverse and vertical section taken through the fiame chamber. Fig. 7 is a transverse section taken through the pot for melting the rosin.

My invention relates to improvements on a furnace wherein rosin is employed as fuel and is melted in a vessel or pot by the heat of the fire and suered to pass into the fireplace or chamber, and I wish it distinctly understood that I do not claim the invention of such a furnace, but only certain improvements which I shall now proceed to describe. y

In the drawings A represents the fire place which is a long horizontal passage laid in briclrworlr B and continued through the same for convenience of removal of ashes. rIhis fire place opens at top into a iiame chamber C, out of which any suitable number of jet passages ct, a, are made to open respectively into embrasures D, D, &c., formed in the brickwork, each being made to communicate with the main discharge chimney E by means of a flue F. For sake of convenience I sometimes place in the flame chamber and against one of the embrasures, a fire clay pot G to be used for the melting of materials composing glass, the mouth b of the said pot opening outward, while the flame from the flame chamber is made not only to circulate in contact with the outer surface of the said pot but over its top and through a port or mouth c made over the same and into the embrasure as seen in the drawings.

In front of the flame chamber and directly over the hre place is the pot or vessel H for the reception and melting of the rosin. Under the bottom of the pot there is to be one or two slidingplates or doors or dampers I, K, for the purpose of regulating the amount of surface of the bottom of the pot against which the fire of t-he tire place may be suffered to impinge.

The interior of the pot II is divided by means of strainer or perforated partition Il into two chambers e, f, the partition being arranged vertically or slightly inclined as seen in the drawings. rIhe rosin to be melted is put in the rear chamber ,t and as it contains more or less gummy matter and foreign substances, they, when the rosin is melted will remain in the chamber f while the fluid rosin will pass through the strainer and into the chamber e. lWere the strainer arranged horizontally these foreign substances and gummy matters would adhere to its surface and clog its holes or meshes so as to hinder or impede the passage of the fluid rosin through them; but when the strainer is arranged in an upright vertical, or slightly inclined position, they either fall upon the bottom of the melting pot by their own gravity or are so kept back as not to clog the perforations or orifices of the strainer.

Another chamber M is made on the front of the melting pot which chamber communicates with the chamber e by means of an opening at its bottom having a Strainer g adapted to it. From the bottom of the chamber M a discharge tube 7i rises upward within the chamber as seen in the drawings, such discharge tube being made to open at its lower end into the fire place. It may or may not be surrounded by a perforated tube or strainer z'. Into the open top of the tube I insert a long conical plug or valve which I connect to a rod Z by a universal joint if necessary. The rod Z passes through a standard m erected on the top of the pot. On the top of the standard and encircling the rod Z is a helical spring fm on whose upper end rests a nut n that is screwed on the upper part of the rod.

In order to have a clear, constant and uniform flow of the rosin down the tube it becomes desirable not only to provide some means of regulating the flow but of freeing the tube from glutinous and foreign matter that may lodge in it. By means of the nut on the rod Z and the spring the height of the valve may be adj ust-ed so as to insure the required openingl Jfor the necessary flow of the rosin. Should any gummy matter get lodged in the tube so as to obstruct the flow, by pressing down the rod of the valve the opening may be sufficiently cleared. On removing the hand from the top of the rod, the reaction of the spring Will elevate the rod to its former position. By such simple means the iow may be regulated and kept clear.

The volatile spirits arising from the heated rosin in the pot may be made to pass oi into the chimney by means of one or more iues n leading through a projection 0 of the brickwork that is made to extend some distance above and over the melting pot.

There should be a narrow space p made around the sides and under the bottom of the melting pot, the same being to permit the heat of the iire to circulate around the sides of the pot. This space in front should be provided With an opening g to Which one or more doors r, s, are applied. By opening the said doors at any time the rosin in the chamber M as Well as in the main pot may be more readily cooled than it could be by closing the damper-s under the pot. There is no flue opening out of the space p and into the chimney, one opening only serves for the ingress and egress of heat. Such an arrangement serves to heat the rosin more equally than it would be Were there a second iue made to lead out of the space p around the pot. The pot is heated by the radiated heat 0I" the column ame that rushes through the iire place and into the ilaine chamber.

I claim- The combining the long conical valve and the discharge tube by means of a set screw and nut and supporting spring-whereby the How of the melted rosin may not only be regulated, but When any interruption takes place the attendant can readily remove the same either by lifting the valve'or pressing on it, and such valve be subsequent-ly moved back to its exact or former position by the spring, this improvement being a very important one in the operation of the apparatus.

In testimony whereof I. have hereby set my signature, this tWenty-siXth day of April A. D. 1852.

BENJAMIN SHIVERICK.

Witnesses:

B. F. LEONARD, E. I. PARKER. 

